diff --git a/tests/qemu-iotests/028 b/tests/qemu-iotests/028
index 6dd3ae09a3..864dc4a4e2 100755
--- a/tests/qemu-iotests/028
+++ b/tests/qemu-iotests/028
@@ -116,16 +116,10 @@ else
     QEMU_COMM_TIMEOUT=1
 fi
 
-# Silence output since it contains the disk image path and QEMU's readline
-# character echoing makes it very hard to filter the output. Plus, there
-# is no telling how many times the command will repeat before succeeding.
-# (Note that creating the image results in a "Formatting..." message over
-# stdout, which is the same channel the monitor uses.  We cannot reliably
-# wait for it because the monitor output may interact with it in such a
-# way that _timed_wait_for cannot read it.  However, once the block job is
-# done, we know that the "Formatting..." message must have appeared
-# already, so the output is still deterministic.)
-silent=y _send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)"
+TEST_IMG="$TEST_IMG.copy" _make_test_img $image_size
+_send_qemu_cmd $h "drive_backup -n disk ${TEST_IMG}.copy" "(qemu)" \
+    | _filter_imgfmt
+
 silent=y qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs"
 _send_qemu_cmd $h "info block-jobs" "No active jobs"
 _send_qemu_cmd $h 'quit' ""
diff --git a/tests/qemu-iotests/028.out b/tests/qemu-iotests/028.out
index 5a68de5c46..e580488216 100644
--- a/tests/qemu-iotests/028.out
+++ b/tests/qemu-iotests/028.out
@@ -468,6 +468,9 @@ No errors were found on the image.
 
 block-backup
 
+Formatting 'TEST_DIR/t.IMGFMT.copy', fmt=IMGFMT size=4294968832
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) drive_backup -n disk TEST_DIR/t.IMGFMT.copy
 (qemu) info block-jobs
 No active jobs
 === IO: pattern 195
diff --git a/tests/qemu-iotests/089 b/tests/qemu-iotests/089
index 66c5415abe..03a2ccf1e8 100755
--- a/tests/qemu-iotests/089
+++ b/tests/qemu-iotests/089
@@ -62,7 +62,8 @@ TEST_IMG="$TEST_IMG.base" _make_test_img $IMG_SIZE
 $QEMU_IO -c 'write -P 42 0 512' -c 'write -P 23 512 512' \
          -c 'write -P 66 1024 512' "$TEST_IMG.base" | _filter_qemu_io
 
-$QEMU_IMG convert -f raw -O $IMGFMT "$TEST_IMG.base" "$TEST_IMG"
+_make_test_img $IMG_SIZE
+$QEMU_IMG convert -f raw -O $IMGFMT -n "$TEST_IMG.base" "$TEST_IMG"
 
 $QEMU_IO_PROG --cache $CACHEMODE --aio $AIOMODE \
          -c 'read -P 42 0 512' -c 'read -P 23 512 512' \
diff --git a/tests/qemu-iotests/089.out b/tests/qemu-iotests/089.out
index 15682c2886..c53fc4823a 100644
--- a/tests/qemu-iotests/089.out
+++ b/tests/qemu-iotests/089.out
@@ -9,6 +9,7 @@ wrote 512/512 bytes at offset 512
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 512/512 bytes at offset 1024
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 read 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 512/512 bytes at offset 512